[CodeGen] Remove unused function isCallerPreservedOrConstPhysReg (NFC)

The last use of the function was removed on Oct 20, 2018 in commit
8d6ff4c0af843e1a61b76d89812aed91e358de34.

diff --git a/llvm/include/llvm/CodeGen/MachineRegisterInfo.h b/llvm/include/llvm/CodeGen/MachineRegisterInfo.h
index a4da62d..a1a6705 100644 (file)
--- a/llvm/include/llvm/CodeGen/MachineRegisterInfo.h
+++ b/llvm/include/llvm/CodeGen/MachineRegisterInfo.h
@@ -625,10 +625,6 @@ public:
   /// function. Writing to a constant register has no effect.
   bool isConstantPhysReg(MCRegister PhysReg) const;
 
-  /// Returns true if either isConstantPhysReg or TRI->isCallerPreservedPhysReg
-  /// returns true. This is a utility member function.
-  bool isCallerPreservedOrConstPhysReg(MCRegister PhysReg) const;
-
   /// Get an iterator over the pressure sets affected by the given physical or
   /// virtual register. If RegUnit is physical, it must be a register unit (from
   /// MCRegUnitIterator).

diff --git a/llvm/lib/CodeGen/MachineRegisterInfo.cpp b/llvm/lib/CodeGen/MachineRegisterInfo.cpp
index f5793c6..9165d6d 100644 (file)
--- a/llvm/lib/CodeGen/MachineRegisterInfo.cpp
+++ b/llvm/lib/CodeGen/MachineRegisterInfo.cpp
@@ -532,13 +532,6 @@ bool MachineRegisterInfo::isConstantPhysReg(MCRegister PhysReg) const {
   return true;
 }
 
-bool
-MachineRegisterInfo::isCallerPreservedOrConstPhysReg(MCRegister PhysReg) const {
-  const TargetRegisterInfo *TRI = getTargetRegisterInfo();
-  return isConstantPhysReg(PhysReg) ||
-      TRI->isCallerPreservedPhysReg(PhysReg, *MF);
-}
-
 /// markUsesInDebugValueAsUndef - Mark every DBG_VALUE referencing the
 /// specified register as undefined which causes the DBG_VALUE to be
 /// deleted during LiveDebugVariables analysis.